Sum, Sumifs or Sumproduct, not sure which one to use?...

using OR within a sumproduct...

SUMIFS + VLOOKUP tricky use in excel...

Find criteria in multiple columns, and sum an offset of each matched value...

How to Search for a total Range in another Range in Excel...

Excel SUMIFS sum_range with variable parameter...

Alternatives to having multiple SUMIF formulas without requiring the user to apply a filter...

Excel sumif with criteria...

Column sumif on an unknown range of rows...

EXCEL: Combining SUMIFS with multiple VLOOKUPs due to small variances in names...

Excel Round individual values before they are summed in SUMIF formula...

Excel COUNTIFS yields the same result with different criteria...

calculating values in excel using sumproduct...

Excel: Optimizing a bunch of very heavy SUMIFS...